FirstRunActivity.java

package indrora.atomic;

import indrora.atomic.activity.ServersActivity;
import indrora.atomic.model.Settings;

import java.io.IOException;
import java.io.InputStream;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.text.Html;
import android.text.Spanned;
import android.text.method.LinkMovementMethod;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.ViewFlipper;

public class FirstRunActivity extends Activity {


  private Resources resources;

  private class HelpTopic {
    public int AddedIn;
    public int TextResource;
    public int TitleReasource;

    public HelpTopic(int add, int title, int text) {
      this.AddedIn = add;
      this.TitleReasource = title;
      this.TextResource = text;
    }
  }

  private static int currentPage = 0;

  public HelpTopic[] topics = new HelpTopic[]{
      new HelpTopic(16, R.string.helptopic_introduction_title, R.string.helptopic_introduction_body),
      new HelpTopic(16, R.string.helptopic_conversation_title, R.string.helptopic_conversation_body),
      new HelpTopic(16, R.string.helptopic_colorschemes_title, R.string.helptopic_colorschemes_body),
      new HelpTopic(17, R.string.helptopic_reconnect_title, R.string.helptopic_reconnect_body),
      new HelpTopic(16, R.string.helptopic_notification_title, R.string.helptopic_notification_body)
  };

  private Html.ImageGetter assetImageGetter = new Html.ImageGetter() {

    @Override
    public Drawable getDrawable(String source) {

      Log.d("AssetImageGetter", "Get resource: " + source);
      try {
        // Load the resource from the assets/help/ directory.
        InputStream sourceIS = resources.getAssets().open("help/" + source);
        // Create a drawable from the stream
        Drawable sourceDrawable = Drawable.createFromStream(sourceIS, "");
        // This gives us the width of the display.
        DisplayMetrics outMetrics = new DisplayMetrics();
        FirstRunActivity.this.getWindowManager().getDefaultDisplay().getMetrics(outMetrics);
        // This tells us the ratio we have to work with.

        double scale = (float)(outMetrics.widthPixels) / (float)(sourceDrawable.getIntrinsicWidth());

        // Take up no more than 50% when in landscape, but 80% when in portrait.

        double imscale = (outMetrics.widthPixels > outMetrics.heightPixels ? 0.5 : 0.8);

        int width = (int)(imscale * outMetrics.widthPixels);
        int height = (int)(imscale * scale * sourceDrawable.getMinimumHeight());

        sourceDrawable.setBounds(0, 0, (int)(width), (int)(height));

        return sourceDrawable;

      } catch ( IOException e ) {
        return getResources().getDrawable(R.drawable.error);
      }
    }
  };

  private Settings ss;
  private ViewFlipper vf;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.firstrun);

    resources = this.getResources();

    // We're going to create a bunch of views to smash into the wizard.
    // These are really going to be TextViews, but with Html loaded into them.

    vf = (ViewFlipper)findViewById(R.id.wizard_flipper);

    View v = View.inflate(this, R.layout.firstrunintro, null);
    try {
      ((TextView)v.findViewById(R.id.versionlabel)).setText(String.format("Version %1$s",
          getPackageManager().getPackageInfo(getPackageName(), 0).versionName
      ));
    } catch ( NameNotFoundException e ) {
      ((TextView)v.findViewById(R.id.versionlabel)).setText("Unkown version!");
    }
    TextView firstView = ((TextView)v.findViewById(R.id.blathertext));
    firstView.setText(Html.fromHtml(getString(R.string.helptopic_titlepage_body)));
    firstView.setLinksClickable(true);
    firstView.setMovementMethod(LinkMovementMethod.getInstance());
    v.setTag(getString(R.string.helptopic_titlepage_title));

    vf.addView(wrapScrollview(v));
    vf.setScrollContainer(true);
    ss = new Settings(this);
    int lrVersion = ss.getLastRunVersion();
    Log.d("Firstrun", "Last version = " + lrVersion);
    for( HelpTopic ht : topics ) {
      Log.d("Firstrun", "addedin=" + ht.AddedIn + " vs ver " + lrVersion);
      if( ht.AddedIn >= lrVersion ) {
        vf.addView(generateHelpPage(ht));
      }
    }

    ss.updateLastRunVersion();

    Button nButton = (Button)findViewById(R.id.action_next);
    nButton.setOnClickListener(new View.OnClickListener() {

      @Override
      public void onClick(View v) {
        Log.d("Firstrun", "on page " + (vf.getDisplayedChild()) + " of " + (vf.getChildCount()));
        if( !isLast() ) {
          vf.showNext();
        } else {
          // We're all cool, be done.
          Log.d("Firstrun", "Finished firstrun");
          FirstRunActivity.this.finish();
        }
        updateButton();
        updateTitle();
      }
    });
    Button pButton = (Button)findViewById(R.id.action_prev);
    pButton.setOnClickListener(new View.OnClickListener() {

      @Override
      public void onClick(View v) {
        if( !isFirst() ) {
          vf.showPrevious();
        }
        updateButton();
        updateTitle();
      }
    });

    if( currentPage > 0 ) {
      vf.setDisplayedChild(currentPage);
    }
    updateButton();
    updateTitle();
    vf.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));
    vf.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));

  }

  @Override
  protected void onPause() {
    currentPage = vf.getDisplayedChild();
    super.onPause();
  }

  protected void updateButton() {
    Button pb = (Button)findViewById(R.id.action_prev);
    pb.setVisibility(isFirst() ? Button.GONE : Button.VISIBLE);
  }

  protected boolean isFirst() {
    return vf.getDisplayedChild() == 0;
  }

  protected boolean isLast() {
    return vf.getDisplayedChild() == vf.getChildCount() - 1;
  }

  protected void updateTitle() {
    this.setTitle((CharSequence)(vf.getCurrentView().getTag()));
  }

  @Override
  public void onBackPressed() {
    AlertDialog ab = new AlertDialog.Builder(this)
        .setTitle(R.string.title_activity_first_run)
        .setMessage(R.string.back_twice_exit)
        .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {

          @Override
          public void onClick(DialogInterface dialog, int which) {
            cleanup();
          }
        })
        .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {

          @Override
          public void onClick(DialogInterface dialog, int which) {
            return;
          }
        })
        .create();
    ab.show();
  }

  protected void cleanup() {
    Intent i = new Intent(this, ServersActivity.class);
    i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    startActivity(i);
  }

  protected View wrapScrollview(View vv) {
    ScrollView scrollable = new ScrollView(this);
    scrollable.addView(vv);
    return scrollable;
  }

  protected View generateHelpPage(HelpTopic topic) {
    TextView contentView = new TextView(this);
    Spanned st = Html.fromHtml(getString(topic.TextResource), assetImageGetter, null);
    contentView.setText(st);
    contentView.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
    contentView.setGravity(Gravity.CENTER_HORIZONTAL);

    View sv = wrapScrollview(contentView);
    sv.setTag(getString(topic.TitleReasource));
    return sv;
  }
}